Optics: measuring and testing – For light transmission or absorption – Of fluent material
Patent
1996-10-15
1998-01-27
Evans, F. L.
Optics: measuring and testing
For light transmission or absorption
Of fluent material
356440, 250576, G01N 2159
Patent
active
057127107
ABSTRACT:
A portable, hand-held spectrophotometric probe detects the concentration of a material dissolved in a liquid bath. The probe has an elongate hollow handle with an open lower end. A transparent cylindrical cell is attached to the lower end of the handle and fills with liquid when the cell is immersed in the bath. A source of light whose spectrum includes an absorption band of the dissolved material is mounted in the handle and transmits light through the cell to a photodetector. The photodetector produces a signal indicative of the intensity of the light, and the signal is transmitted along wiring to a signal outlet in the upper end of the handle. A hand-held processing unit is coupled with a cable to the outlet to receive the signal and then calculates and displays the concentration of the dissolved material.
REFERENCES:
patent: 3319514 (1967-05-01), McAllister, Jr.
patent: 3727066 (1973-04-01), Louderback et al.
patent: 3734629 (1973-05-01), Griffiths et al.
patent: 4719359 (1988-01-01), Rose
Das Leena
Karakus Cetin
Evans F. L.
Karakus Cetin
Waraksa Mirek A.
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